They really cannot interface with the Real World, without leaking real-world problems into the "perfect" smart contract-driven crypto systems. They can't interface with the real-world financial systems (with stablecoins) and expect it to be always stable (see USDC), they can't interface with people doing real-world chores/tasks and have it reflected in blockchain brownie points aka tokens (like socially-useful DAOs like the one in the article), they can't interface with logistics where people and machines do actual work and fail unpredictable (like blockchain tracking of the supply chain), they can't authenticate artwork purely on blockchain (without paying actual people to guard the artwork), etc.
They just can't. All projects claiming they can are pure scams (of course, I'd be very happy to be proven wrong).
The nearest we can get to having perfect digital systems like cyptoanarhysts and cryptobros (sometimes there isn't any difference) advocate is to give up on the physical world and actually move everything into the metaverse where it doesn't depend on real world messyness, but then a) people will still find ways to mess things up and b) this Matrix-like system still needs electricity.
Just... embrace the messiness. You can't really escape it. Crypto is not special. Blockchains are useful tools, but so far, systems based on them they have not been proven to be strictily better than real-world messyness.
The best use cases for blockchains are those which don't really earn a lot of money for the operators, such as tracking publically visible official data - like university degrees, corporate tax returns and financial statements, fighting fake news, etc. - so they are avoided like the plague.